Automatic spring shade-roller



(No Model.)

J. J. ADGATE & P. HIGKMAN.

AUTOMATIC SPRING SHADE ROLLER.

Patented June 10, 1884.

UNITED STATES PATENT OETTQE.

JOSEPH J. ADGATE AND FRANCIS HIOKMAN, OF NE\V YORK, N. Y., ASSIGN- ORSTO STEVART HARTSHORN, OF MILLBURN, NEYV JERSEY.

AUTOMATlC SPRING SHADE-ROLLER.

SPECIFICATION forming part of Letters Patent No. 300,297, dated June 10,188%.

Application filed March 13, 1884. (No model.)

To all whom it may concern:

Be it known that we, Josnrn J. ADGATE and FRANCIS HICKMAN, both of thecity, county, and State of New York, have invented new and usefulImprovements in Automatic Spring Shade-Rollers, of which the followingis aspeoification.

Our invention relates to that class of auto matic spring shaderollers inwhich a pawl and ratchet are employed to lock the roller and spindle inand out of the brackets. As heretofore constructcd,it has been necessaryto drill a hole through the pawl, and also through the end plate of theroller, and hold the pawl in place by means of a pivot passed throughsuch holes in the pawl and plate and then riveted. This form ofconstruction has been objectionable for many reasons. It requiresconsiderable care and labor to drill the pawl and plate properly, theplate usually being made of chilled metal and very hard, and, owing tothe smallness of the parts a high degree of skill and nicety ofexecution are necessary to properly adjust and rivet the parts. In ourinvention wc dispense with the use of pivots, and the necessity ofdrilling either the pawl or plate, by casting in and with the plate arecess or recesses adapted to loosely embrace the heel of the pawl,while the pawl is prevented from escaping laterally by a concentricoverlapping rim on the end cap. This construction allows the pawl tooscillate freely and properly perform its functions of locking andunlocking the roller and spindle, while at the same time the pawl issecurely held and prevented irom becoming disarranged or out of order.Our invention also has other details of improvement, which we will morefully describe. Aside from the parts hereinafter particularly described,we employ the usual mechanism for uniting and operating the spring,spindle, and roller of automatic spring shaderollers.

In the drawings, Figure 1 is a longitudinal sectional view of ashade-roller, showing our improved locking device. Fig. 2 is an end viewof our locking device with the end cap removed; and Fig. 3 is the same,with the cap applied. Figs. 4: and 5 are modifications hereinafterreferred to.

Similar letters of reference designate similar parts in all thedrawings.

A is the shade-roller. B is the end cap, and O is the end plate. (7. isthe pawl, which engages with its too e the ratchet f on the spindle H. gis a flange cast with and as a part of the end plate 0, forming arecess, k, to loosely embrace the heel i of the pawl (1, but having anopening, 71, therein, to permit the passage and action of the pawl. Theportion of the pawl which plays in the opening 72 is smaller than itsheel i, so that the heel i f the pawl may oscillate in but not escapefrom the recess k. The form of the recess within the flange 5/ may besomewhat varied, as may 6 5 be alsothat of the pawl-heel, so long as therecess and heel are so constructed that the latter may turn in theformer without cscaping therefrom. The pawl is prevented from escapingin the line of the spindle by being held between theplate G and theoverlapping rim l) of the cap 13, which rim D, when the cap is placedover the plate 0 and the end of the roller A, will rest upon or so nearto the flange g as to prevent the pawl (Z 75 from escaping from withinthe same. These. caps are usually formed of a single piece ofsheet-brass or similar metal, which is spun up into the form of a cap,and the central portion then punched or out out, leaving the So rim D.Heretofore this cap has been employed only to hold in place the plate 0,and hence but a very narrow r im has been required to embrace the edgesof the plate. By making the wider rim, D, as shown, the cap 0 is made toS5 perform another and additional function by holding in place the pawl65 also; and as the central part between the edges of the rim is cut orpunched out in any case, no additional expense is incurred by cuttingout a smaller 9 portion of it, so as to form a wider rim, as shown;butit is not essential that the rim D should have an annular form, asshown, for all the portions of the rim not required to hold in place thepawl d and plate C may be cut away, and our invention maybe furthermodified by forming the flange g on the inner side of such rim insteadof on the plate- O, and this could be done by striking or bending up themetal of the cap-rim, in lugs or otherwise, to I00 form or serve thepurposes of such flange; or,

if the cap is cast, such flange or its equivalent can be. castthereupon, as shown in Figs. land 5. When the pawl engages with theratchet,

' taken up by the pawl in-a direction from its toe to its heel.

pivot, the pivot is of necessity small and liable,

in their proper positions.

If the pawl is hung upon a to be loosened, bent, and broken by thefrequent jars occurring in the operation of the roller. In our inventionthis jar or shock is delivered by the broad and rounded heel of the pawlagainst the corresponding bearing in the recess, and distributedover amuch wider surface, and the danger of loosening, breaking, bending, ordisarranging the bearings of the parts is entirely avoided.

In constructing our improved locking device the end plate, O, is castwith the flange 9 upon it, and applied in the usual way to the end ofthe roller. The pawl, having been made with a suitable heel, is droppedinto its proper place. The end cap is placed over the plate and pawl andfastened to the roller, and thereby all the parts are permanently andsecurely held As is well kn own, the parts of our automatic lockingdevice may be transposed, so as to lock the roller when in its brackets,by placing the The combination,with a shade-roller,-of end I plate, 0,an end cap having a flange, D, the central spindle having ratchet f, anda pawl or pawls, d, held by its heel in a socket, and between plate 0and flange D, and adapted to catch by its toe in the ratchet f,substantially as shown and described.

JOSEPH J. ADGATE. FRANCIS HIOKMAN.

\Vitnesses:

ANDREW WILsON, WILLIAM D. NEILLEY.

